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AN / EN Inc <br /> Analytical& Environmental Chemistry <br /> LABORATORY CONTROL SAMPLES <br /> Method VOLATILE AROMATICS AND TPH AS GASOLINE BY GC/PID <br /> Date Aquired 10/09/00 <br /> Expressed as mass(ng) <br /> Amount Amount LCS %Rec <br /> Analyte Added Found Rec Limits <br /> Methyl-tent-butyl Ether 40 43 107% 80-130 <br /> Benzene 20 20 99% 85-120 <br /> Toluene 20 20 99% 85-120 <br /> Ethylbenzene 20 20 99% 85-120 <br /> m p-Xylenes 20" T 19 --96% 85-120 - <br /> o-Xylene 20 20 100% 85-120 <br /> TPH-Gasoline 1 250 -1,271 102% 65-140 <br /> Surrogates - 4- _ _ LCS-8020M - Batch ID 1009-04 - - - - - <br /> a,a a-TFT-FID 100% 60-130 <br /> 4-BFB-FID 103% 55-150 <br /> 4-BFB-PID 102% 65-140 <br /> Surrogates LCS-GASOLINE Batch ID 1009-05 <br /> a,a,a-TFT-FID 85% 60-130 <br /> 4-BFB-FID 114% 55-150 <br /> 4-BFB-PID 147% 65-140 <br /> =Values outside of QC limits <br /> LCS Recovery 0 out of 7 outside limits -- <br /> 3 <br /> I <br /> I <br /> Ll�d <br /> I <br /> 55 PENNYLANE, SUITE 101 WATSONVILLE, CA 95076 (831) 786-0123 ® (831) 7860172 Fax 1glantz@msn com <br /> �cvrieri paper QC-LCS <br />